A primary input required for the computation of stability lobe diagrams is the vibration response at the free end of the cutting tool, typically obtained through impact testing. The Machinist Online takes advantage of a method referred to as Receptance Coupling Substructure Analysis, or RCSA, to predict this vibration response. The corresponding stability lobe diagram can then be determined using the RCSA prediction and specific cutting energy values, which mainly depend on the workpiece material and tool geometry (average values for selected materials are available via drop-down menus).

The Machinist Online allows the user to select from a list of pre-characterized machine-spindle combinations, define the holder and cutting tool characteristics, select the workpiece material, and choose the desired radial depth of cut in the Parameter Selection application. Using the predicted tool point vibration response, the associated stability lobe, MRR, and power diagrams are then automatically determined. Using the recommended cutting conditions, cutting force and deflections can also be computed by time-domain simulation using the GatorMill application.

Future additions to the web site will include accessing the TechSolve CUTDATA database to determine recommended chip loads and maximum surface speeds to avoid prohibitive tool wear rates.

Thank you for visiting the Machinist Online. We look forward to hearing your feedback.

Dr. Tony Schmitz (tschmitz@ufl.edu)
Machine Tool Research Center
University of Florida